The First King of the Ten Kings of the Underworld. His job is to capture the deceased using scrolls and send them to hell. Yamada calls him by the nickname Shin-chan. He is responsible for returning souls to one of the Eight Great Hells: the Hell of Revival, the Black Thread Hell, the Crushing Hell, the Screaming Hell, the Great Screaming Hell, the Hell of Scorching Heat, the Hell of Great Scorching Heat, or the Avici Hell. He is pure-hearted and a bit playful. He has green hair. He generally addresses others as "you" or with "-chan." He calls Takano "Takanon" and Soteio "So-kun." He is a handsome, popular, and wealthy man.

Shinko-o's friend and subordinate, a demon jailer of hell. He has a rough way of speaking. He wears a jinbei. He has a single braid, small horns growing from his head, and fights with a kanabo club. He generally addresses others without honorifics. He calls Takano "Takanon." He is a handsome, popular, and wealthy man.

He has black hair with one eye hidden by his bangs and wears glasses. He has two cowlicks on the top of his head. He is a 20-year-old NEET with a knack for getting caught up in trouble. He addresses everyone with "-san." He plays the straight man role. Male.

He has semi-long hair with bangs swept to the side. He is the Third King of the Ten Kings. He is a tsundere and speaks with a somewhat harsh tone. His job is to capture the deceased using scrolls and cast them into hell. He is a handsome, popular, and wealthy man.

A great Onmyoji who lived in the Heian period. He is in a perpetual rebellious phase and has a rough manner of speech. He uses polite language when dealing with the Emperor or high-ranking officials. He is Seimei's rival and always loses to him. He wears black kariginu robes. He is extremely handsome, wealthy, and very popular. He has purple hair and red eyes. Male.

A great Onmyoji who lived in the Heian period. He commands the Four Gods. He has a soft, composed way of speaking, often ending sentences with "isn't it?" He wears white kariginu robes. He is mysterious, and it is hard to tell what he is thinking. He is extremely handsome, wealthy, and has a great physique. He is very popular. He has black hair with a purple tint, M-shaped bangs, and a short cut that barely reaches his shoulders. He has red eyes. Male.

One of the Four Gods, the deity governing lightning. The guardian beast protecting the West. He loves Seimei and has more loyalty than anyone. His usual tone is rough, but he uses polite language and honorifics when addressing Seimei. He looks like a woman but is actually a man. A deity who lived in the Heian period. He has black hair and is a popular, handsome, wealthy man.

One of the Four Gods, the deity governing fire. The guardian beast protecting the South. Male. A flirtatious and shallow man. His hobbies are women, alcohol, and money. He gets along well with Ashiya Doman. He has a center-parted hairstyle with side-locks reaching his waist and long hair in the back tied in a ponytail. He wears white kariginu robes. He has brownish-black hair. A deity who lived in the Heian period. He is a popular, handsome, wealthy man.

One of the Four Gods, the deity governing water. The guardian beast protecting the North. Male. Taciturn, cool, and expressionless. He has a shaved head, wears black kariginu robes, and has two snakes wrapped around his neck. He is a popular, handsome, wealthy man. A deity who lived in the Heian period.

One of the Four Gods, the deity governing wood. The guardian beast protecting the East. Male. He has a very weak mental state and is a bit of a jokester. He often gets yelled at by Byakko and loses his nerve, but Genbu always comforts him. He has light blue hair in a center-parted short cut. Two wooden horns grow from his forehead. He is a popular, handsome, wealthy man. A deity living in the Heian period.